Questions & Answers about Tvö hús eru mjög stór.
Why do we use tvö for "two" instead of tveir?
In Icelandic, the numbers 1, 2, 3, and 4 change their form to match the gender of the noun they are counting. Since hús (house) is a neuter noun, we must use the neuter form for "two", which is tvö. You would use tveir for masculine nouns and tvær for feminine nouns.
Wait, does the word hús mean both "house" and "houses"?
Yes! For neuter nouns that are only one syllable long (like hús or barn), the plural form is exactly the same as the singular form. We know it means "houses" here because it comes right after the number tvö (two) and is paired with a plural verb.
Why is the adjective stór (big) used without a plural ending like "-ir" or "-ar"?
Adjectives also change to match the noun's gender and number. The neuter plural form of "big" happens to just be stór. It looks exactly like the basic dictionary form, but it is specifically matching the neuter plural tvö hús. If the noun were masculine plural, you would use stórir.
Why do we use eru instead of er in this sentence?